Title: Application and analysis of stiction estimation methods to control valves
Authors: Claudio Garcia , Matheus Hidalgo
Abstract: Friction in control valves is one of the main sources of variability in control loops. This paper analyzes four non-intrusive methods for friction quantification applied to two real control valves, one with low and the other with high friction. It was used three different tunings in the PI controller and the experiments were performed with two distinct set-points, in order to analyze how they affect the friction parameter estimation. The obtained results were compared to friction coefficients extracted from an intrusive method. The four methods presented good results in some cases but, on the other hand, some problems were detected in their application.
Publication date: 2012-07-16
Online entry date: 2013-05-08
Conference: CONTROLO’2012
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